Secondary battery.



No. 888,602. PATENTED MAY 26, 1908. R. J. PLEISGHER. SECONDARY BATTERY.

APPLICATION FILED APR. 8,1907.

. 1 tion thereof. 10'

UNiTED sTArEs RICHARD J FLEISGHER, OF MILWAUKEE, WISCONSIN.

PATENT OFFICE.

snoornmrvr BATTERY.

Specification of Letters Patent.

Patented May 26, 190 8.

Application an April 8, 1907. Serial No. 366,930.-

new and useful Improvements in Secondary,

Batteries; and I do hereby declare that the following is a full, clear, and exact descrip The invention consists in what is herein shown, described and claimed, as having especial reference to an effectlve seahng' of the jars of secondary batteries.

Figure 1 of the drawings represents a sectional view of a secondary battery embody- -ing my improvements, an electrode of the same being partly broken away; Fig. 2, a sectional viewofafragment of the battery showing an electrode partly broken'away and connected to a binding-post plate common to a plurality 'of electrodes, this view being indicated byline 22 in Fig. 1 Fig. 3, a

transverse section of a fragment of an electrode, the same being magnified and Fig. 4, a side elevation of a fragment. of a perforated metallic plate portion of an electrode mag-' nified.

Referring by letter to the drawings, A indicates an ordinary secondary battery jar having a detachable cover'Bof glass or other suitable material provided with suitably arranged binding-post apertures and gas-vent apertures. The underside of the cover is grooved to match the continuous rim of the battery-j er and j ar-partitions A that engage the grooves against suitable acid-resisting I .packing material 1) arranged therein, and due to the arrangement of said grooves the packing is so protected as to bemost durable and effective. The jar is provided with an endless upper outer continuous flange d, on a ing suitable plane tures for bolts e having clamping nuts f run on their screw-threaded ends. If the jarcover be of glass or othertransparent material, the j ar-contents and working of the battery can 'be-readily inspected at any timewithout removal of said cover. It is essential to an efiicient sealing of the cover on the jar, that the rim of said jar extend above the flange d and en age cover-grooves containac ing, as aforesaid, and the partitions being similarly extended and likewise. engaged .with cover-grooves containing elow its rim and the upper ends of the partitions aforesaid the cover B and said jarflange being provided with registering aperas herein shown, tofuse the casing-body to a top :barD of lead or other suitable material having a shank a fused or otherwise suitably j'oined'to a binding-post base E common to a able, as herein shown, to fuse said casingbody to end bars F of lead or other suitable material, the bars aforesaid enhancing the conductivity of the electrode.

Each binding-post base E is of lead or other suitable acid-resisting material and has a neckE that extends through an aperture in the jar-cover with which aperture it has snug engagement, and a seat is provided in said base for an acid-resisting packing-washer g that'surrounds said neck and abuts the underside of said cover. The neck portion E" of each base E is cast on its companion bind ing-post E, and run on this post is a clamping nut '5 provided with a lower end recess engaged by a cover-opposing acid-resisting packmg-washer it, this washer and the one 9 aforesaid beinginsured'against loss and detrimental deterioration. It is also to be understood, that because of the neck- E ofthe bindingost base E, as well as the arrangementali confinementof theJwashers g, h, the electrolyte ofthe" battery is prevented from I mg an important feature of my invention.

The casing is filled with a suitable active material G with which shreds of pure or suit ably alloyed lead are incorporated to ,bond said active material and improve the conducof lead with the aforesaid active material bements, an to further enhance the conducductile wire H is coiled in said casing, one end of the wire being fused in connection with the top-bar D and a shank c aforesaid. The ,casing is filled with the active material from the fillmgfirocess, and as the filling proceeds, the wire is bent from time to time to form the coils of same. .The bottom of the casing is plurality of electrodes, and it is also prefertivity of the electrode, this mixture of shredsmg an im ortant-feature of my improvetivity of each electrode, a preferably flattened bottom, said casing being inverted during the attacking thebjnding-post. proper, this besho'wnclosed, as a result of infolding of the sides of its bod C, and the lapping folds may be fused toget er if desired. However the bottom of said casing may be otherwise suitably closed.

.From the foregoin become detached and fall into tery cannot the 'submergin fluid to the detriment of said battery, as is eguently the case where the active material 0 originally powder form is mixed with other suitable material to form a plastic applied to lead-grids upon which it sits, as is common practice.

The perforations of the casing-bod O'of each electrode are preferably formed y triangular indentation of the same at suitableintervals thereof, the conver ence of each perforation being toward the iottom of the electrode, and struck in portions of said casing-body adjacent to the perforations constitute triangular 1i 5 that become embedded in the filling of said electrode. By this construction, best shown in Fi 3 and 4, the conductivity of the electrode is improved and ample clearance obtained for entrance of the submerging fluid into said electrode and th ready escape of gases therefrom.

it will be understood that the particles of t e electrodes of the bat bases, and binding-post nuts havin I end recesses engaged by the outer was ers. 45

\ In testimony that I claim the foregoing I I claim:

1. A secondary battery comprising a partitioned jar having an upper outer flange be- 30 low its rim, a cover having a continuous underside groove engaging the rim and a groove engaging each partition, packing. in the grooves op osing said rimand artition, and

means for olding said cover in detachable 35 have hereunto set my hand at Milwaukee in the county of Milwaukee and State of'Wisconsin in the presence .of two witnesses.

RICH. J. FLEISCHER;

Witnesses:

N. E. OLIPHANT, GEORGE FELBEL. 

